An armed robber threatened betting shop staff with a gun before making off with cash.
Police say the masked raider entered Ladbrokes in Hextable Road, King's Lynn, just after 7pm last night.
The three staff members in the store at the time were left shaken but otherwise unhurt.
Police are appealing for anyone who saw the incident or any suspicious people or vehicles in the area to contact them.
Anyone with information should call Det Con Paul Chapman at King's Lynn CID on 0845 456 4567 or e-mail cidappeals@norfolk.pnn.police.uk.
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